Take-up mechanism for knitting-machines.



v F. WILCOMB. TAKE-UP MECHANISM FOR KNITTING MACHINES.

Patented 0m, 1, 1918;

2 bHEETS-SHEET l APPLICATION FILED SEPT. 9. 1916.

hueni'or NORRIS PETERS 00.. pyomun m. wAsl-lmawh. ol"c F. WILCOMB.

TAKE-UP MECHANISM FOR KNITUNG MACHINES.

Patented Oct. 1, 1918.

2 SHEETSSHEET 2- APPLICATION FILED SEPT. 9. X916.

Fran

ms vomus PETERS mv (Moro-1:40.. wnsmlvcmu, n, a

nan seems PATEIJW I FRANK-WELCOME, or NORRISTOWN, rENNsYLvANrA, nssienon To WILDMAN MFG. 00.,

OF NORRISTOWN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

TAKE-UP MECHANISM F011 KNITTING-MACHINES.

-T all whom it mayconcerm I Be it known that'I, FRANK WILooMB, a citizen of the United States, and resident of Norristown, Pennsylvania, have invented certain new and useful Improvements in" Take-Up Mechanism for Knitting MachineS.

of which the following is a specification.

One object of the invention: is. to provide afabric takeup mechanism having a high degree of'sensitiveness adapting it for work with light fabrics, such for instance, 1' as knitted tape. Knitted fabric which is to be used as tape for binding garments .is made from fine yarn and thefabric being narrow v a takeup to work with suchfabric must be of sucha constructionlas will quickly re' spond to any slight extra tension on the fabric above that predetermined upon and will rapidly absorb or take up any slackness which may occur in the fabric.

Take up mechanisms which are intended for'use with the usual wide fabric knit with the coarser yarns are not suitable for the character of goods with which the present takeup mechanism is intended to work, not being delicate enough in either operation or adjustment.

To. meet the requirements"necessary in workingwith a light narrow fabric the pres-.

cut invention has been devised and its subordinate objects and its novel characteristics will appear from the following d escription and the appended claims,'taken in connection with the accompanying drawings,"in which;

Figure :1 1s a side elevation of ajknittingf ma chine embodying my .imp roved takeup mechanism.

Fig. 2 is aside View of the takeup mecha 4o nism detached from thelmachineg Fig. 3 is a plan view of the takeup mech-' anism. v I V IThe takeup mechanism is driven from and directly associated .with the maindrive shaftfof the knitting machinejwhich drive shaft is indicatediat l mounted in suitable bearings'in the frame. This main drive shaft has a pulley 2 thereon which through an upwardly extending belt 3 drives a pul- 6 ley 4 on the shaft '5 suitably 'jo'urnal'ed in the base of the knitting head. The fabric" Specification of Letters latent. V P t t 0 5 9 13.

' Application filed September 9, 1916. Serial No. 119,268.

indicated at X passes down from theknit-v ting headbetween fabric rolls 6 and 7 10- cated near the lower part'of the main supporting frame 8 of the machine, which-main frame isin turn supported by'the' legs 9.

Of these fabric rolls the one marked (S -is posltively driven, this roll being mounted in arms 10 of a p1voted support 11 the pivot of which is at 12011 the supplemental frame 13. The arms 10 provide a forked oonstruce tion in :which the fabric roll 6 is journaled.

The other fabric roll 7 is journaled' in a sup:

plementalforked member comprising arms 14 and the main piece or cross bar 15, the main portion being pivotally mounted at 16 'in'the arms 10 ofthe main forkedbracket or support 11. Themain portion 15 offthe supplemental bracket 14 has'a shoulder at 17 which is engaged by a plunger 18 back of which is aspring 19 upon which a plunger 20 presses, this plunger being adjustable by a screw 21. These plungers with the in-.

termediate spring 1-9 are located in an opening or bore of the pivoted support or bracket ll and by adjusting the screw 21 the tension ofthe spring 19 will be varied and thereforethe tension exerted upon the roll 7 may be varied to suit different conditions."

As abovejstat'ed the fabric passes down diameter greatlyiin excess of that ofthe fabric roll 6. This friction wheel is mountv ed upon thewextension of the shaft 6, that carries the fabricfroll6, the large friction Wheel being 'thuslocated as shown in Fig. 3" alongside'of the pivoted bracket or" support I 11,' whichfcarries the fabric rolls. This large diameter friction drivenwheel rests by gravity upon aifriction drive wheel or disk 23 mounted directly upon the mainfldrive shaft 1 of the knitting machine. Preferably the large diameter driven wheel 22 isiof metal having" its periphery leather [covered whilethe drive wheel 23 is made up'of a series of disks of: leather orother suitable material arranged sideby side. The drive wheel 23 is of considerably smaller diameter than the large driven wheel 22, the purpose of the relative diameters of the drive wheel 23, driven wheel 22' and the small fabric roll 6 beingto secure a proper degree of leverage in transmitting the power to the takeup roll. 7

Itwill be observed that the fabric being gripped between the two fabric rolls 6 and 7,

if the tension on the fabric increases, the

' fabric rolls will have a tendency to climb onthe fabric and thus reduce the frictional drive pressure between wheels 22, 23 and the rotation of the wheel 22 will be reduced or it ,will cease momentarily until the production of fabric at the needles has relieved the i tension and'then the friction wheel 22 will resume its normal frictional contact with the drive-wheel 23 and the takeup action willproceed at the normal rate. The wheel 22 is 7 therefore rotated intermittently ac-- cording to the demands of-the takeup strain r .While as above, stated, the fabric, rolls:

tend to climb on the fabricfact ual separation of the driven frictio1iwheel22 from the drivewheel 23 does not necessarily take place, as the reduction in frictionpressure will cause theslowing down or cessation in the revolution of the large, diameter friction wheel 22 and consequently the reduction or cessationof the takeup action. The

fabric'roll 7 being under springjtension will yield for the passage ofextra thicknesses of the fabric accommodating itself automati-- cally to variations of this character.

What I claim is a i 7 1. In combination in takeup mechanism forjknitting machines, a constantly rotating driving member on a horizontal axis and mounted on the fixed frame of-the machine,

a driven member also on a horizontal axis and mounted onithe fixed frame, said membersrengaging each other at their peripheries, a takeup roll connected with and actuated from the driven-member, the driving engagement. between the said members varying in accordance with variations in the tension of the c bed.

,2. In combination in takeup mechanism for knitting machines, a drive member re, tatable about -a fixed: horizontal axis, a driven member also rotatable about'a horizontal shaft upon which the said drivenmember is -mounted, a movable support for j saiddriven member to allow the jsarne by gravity torest with its periphery in contact;

with the'periphery of the driving member,

, said support bein mounted on the fixed frame," a takeup r0 1 actuated by the driven member, andvarranged coaxially therewith and upon the samesh'aft, said'roll engaging. the fabric on one sideand a roll engag ;1n,g

the fabric on the other side and carried by said movable support, said rolls gripping fabric, substantially as de-Z the fabric between them and tending to climb on the fabric and relieve the contact pressure between the driving and driven members, when the tension of the fabric increases, substantially as described.

3. In combination in a takeup mechanism for knitting machines, a main drive shaft for the knitting machine, a pulley thereon,

a belt extending up from said pulley, a driven'pulley engaged by said belt, a wheel on the main drive shaft, a driven wheel resting thereon by gravity, a fabric roll on the shaft of the driven wheel and means for holding the fabric against said roll to be taken up thereby, the rotation of said roll varying ,in accordance with the variations in the frictional pressure between the driven friction wheel and the drive wheel conse quent upon variations in the tension of the.

fabric, substantially as described.

4, In combination in' takeup mechanism for knitting machines, a pivoted forked support, a fabric roll mounted between the arms of said fork, a friction driven wheel outside the said fork and mounted on the shaft of the fabric roll, a supplemental fork pivotally mounted in the main fork, a sec bracket pivoted tothe main bracket, a fabric,

roll mounted in the supplemental bracket and having a shoulder above its pivot, a

spring housed in. the main bracket and ex-' erting pressure against the shoulder of the supplemental bracket and ing the spring. 7

6 In combination inv a takeup for knitting machines, a drive wheel arranged on a horizontal axis, a larger diameter driven wheel resting by gravity on the periphery of the drive wheel, a fixed frame, a movable support .for said large diameter driven wheel movably held by said fixed frame and a takeup rollof small diameter mounted coaxially ,with and on the horizontal shaft of the large diameter driven wheel,

substantially as described.

for knitting machines, a drive wheel on a means for adjust '7. In combination in a takeup mechanism horizontal shaft, a driven wheel on theh f zontal shaft resting with its periphery and by gravity upon the periphery of thedrive wheel, a, fabric roll coaxially arranged, con-3 nected with and actuated by the driven wheel,a second fabric roll gripping the fab ric between itself and the first fabric roll and rotated by the said first fabric roll 1,:i80,60s V V B through the fabric and a yielding mounting eter connected with the driven fabric roll for the second fabric roll, substantially as and a friction drive wheel of small diamedescribed. ter with means for constantly rotating the 8. In a gravity takeup for knitting masame, said drive Wheel having peripheral 5 chines, a pair of fabric grip rolls, one of contact with the wheel of large diameter, 15 said rolls being pivotally mounted to open the degree of pressure between the friction and close the space between the rolls, the wheels being governed by the fabric tension pivoted grip roll being rotated by the fricand gravity, substantially as described. tional contact of the fabric between the In testimony whereof Iaflix my signature. 10 rolls, a friction driven wheel of large diam- V FRANK VVILCOMB.

Copies of thid patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. 0. 

